Cisco Cisco Packet Data Gateway (PDG) Guia De Resolução De Problemas
Troubleshooting
▀ Troubleshooting the PDIF
▄ Cisco ASR 5000 Series Packet Data Interworking Function Administration Guide
OL-22963-01
MS is already registered to another IPSec session, establishes the new session, and then clears the old session, but only
if the new IPSec session is successfully established.
if the new IPSec session is successfully established.
The MS Temporarily Roams Away From the WiFi Access Point
The PDIF can detect this event if the MS temporarily roams away from the WiFi AP for sufficient amount of time and
DPD is configured on the PDIF side. The PDIF deletes the IPSec session. However, it would not be able to detect this
event if the DPD was not configured, since it could not initiate DPD exchanges with the MS.
DPD is configured on the PDIF side. The PDIF deletes the IPSec session. However, it would not be able to detect this
event if the DPD was not configured, since it could not initiate DPD exchanges with the MS.
Since the PDIF is no longer receiving DPD exchanges or user data from the MS, eventually the PDIF inactivity timer
expires and the PDIF deletes the IPSec session.
expires and the PDIF deletes the IPSec session.
If the MS roams back into the WiFi AP coverage area before the inactivity timer expires or before the DPD mechanism
on the PDIF triggers session tear down, the MS resumes the existing IPSec session. Normal DPD exchanges resume,
and the IPSec tunnel is available for FMC calls or other data activity.
on the PDIF triggers session tear down, the MS resumes the existing IPSec session. Normal DPD exchanges resume,
and the IPSec tunnel is available for FMC calls or other data activity.
This scenario does not address the question of how the MS knows that the roaming is temporary. If the MS roams into
the CDMA network and registers with the HA, the IPSec session would be deleted. Thus, for this scenario to be valid,
the MS must avoid roaming into the CDMA network during this temporary period.
the CDMA network and registers with the HA, the IPSec session would be deleted. Thus, for this scenario to be valid,
the MS must avoid roaming into the CDMA network during this temporary period.
Should it do so, the MIP registration with the HA is updated, causing the HA to send a MIP Registration Revocation
Request to the PDIF, which deletes the IPSec session with the MS.
Request to the PDIF, which deletes the IPSec session with the MS.
MS Proxy-MIP Registration Failure
If the MS establishes an IPSec session but the Proxy-MIP registration attempt fails, the IPSec session is disconnected.
MS Proxy-MIP Registration Renew Failure
If the MS establishes an IPSec session but the Proxy-MIP registration renew attempt fails because no RRP response is
received or an RRP response indicating a failure is received, the PDIF deletes the IPSec session.
received or an RRP response indicating a failure is received, the PDIF deletes the IPSec session.
MS MIP Registration Failure
If the MS establishes an IPSec session but the MIP registration attempt fails, the PDIF can fall back to simple IP mode
on session setup timer expiry if an RRP response indicting failure has been received. If no RRP response is received, the
PDIF will fall back to simple IP when the setup timer expires. Note that fallback to simple IP must also be enabled in
the system configuration for this to occur.
on session setup timer expiry if an RRP response indicting failure has been received. If no RRP response is received, the
PDIF will fall back to simple IP when the setup timer expires. Note that fallback to simple IP must also be enabled in
the system configuration for this to occur.
WiFi or Access Network Failure